Just out of curiosity, I went ahead and put my hack to sleep, waited a minute, woke it up, and mounted a dmg. No KP. What non-vanilla kexts do you have loaded and do you have a dsdt file loading, and if so what mods have you done to it?

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[HACK P5K]
ASUS P5K Deluxe/Wifi [ Q9650 / 8GB OCZ / EVGA 8800 GTX ]
Windows Se7en 500GB SATA
OSX 10.6.4 (vanilla-EFI) 500GB SATA
[HACK EP43]
Gigabyte EP43-DS3L [ E6700 / 8GB OCZ / PNY 250 GTS ]
Windows Vista 64bit 250 SATA
OSX 10.6.4 (vanilla-EFI) 160GB SATA